Intrinsic spin Hall conductivity of the semimetals MoTe2 and WTe2
Intrinsic spin Hall conductivity of the semimetals MoTe2 and WTe2
复制标题
半金属 MoTe2 和 WTe2 的本征自旋霍尔电导率
DOI：
10.1103/physrevb.99.060408
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发表时间：
2018-12
影响因子：
3.7
通讯作者：
Zhao Weisheng
中科院分区：
文献类型：
--
作者：
Zhou Jiaqi;Qiao Junfeng;Bournel Arnaud;Zhao Weisheng
报道了用从头算方法对半金属化合物MoTe2和WTe2的本征自旋霍尔电导(SHC)进行了全面的研究。由于半金属中强的自旋轨道耦合效应和低的电荷电导率，已经发现了大的SHC和理想的自旋霍尔角。不同的各向异性SHC值，归因于不寻常的约化对称晶体结构，已被揭示。我们报道了一种有效的电子掺杂优化SHC的方法，并揭示了SHC随自旋Berry曲率的能量转移而变化的机制。我们的工作为在2D系统中实现强自旋霍尔效应提供了见解。
We report a comprehensive study on the intrinsic spin Hall conductivity (SHC) of semimetals MoTe2 and WTe2 by ab initio calculation. Large SHC and desirable spin Hall angles have been discovered, due to the strong spin orbit coupling effect and low charge conductivity in semimetals. Diverse anisotropic SHC values, attributed to the unusual reduced-symmetry crystalline structure, have been revealed. We report an effective method on SHC optimization by electron doping, and exhibit the mechanism of SHC variation respect to the energy shifting by the spin Berry curvature. Our work provides insights into the realization of strong spin Hall effects in 2D systems.
影响因子：
8.6
作者：
Yao, YG;Kleinman, L;Niu, Q
通讯作者：
Niu, Q
影响因子：
64.8
作者：
Soluyanov, Alexey A.;Gresch, Dominik;Bernevig, B. Andrei
通讯作者：
Bernevig, B. Andrei